Improvement in windmills



` T. M. C.- CHAPMAN..

Wind-Mills.

Patented Dc. 9,1873.

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,4M PHON -l HHM/M Pfl/L' Ca. M X maak/vis Mams UNITED STATES PATENT OFFICE.

MATTHEW T. CHAPMAN AND MAR-K C. CHAPMAN, OF AURORA, ILLINOIS.

IMPROVEMENT IN WINDMILLS.

Specification forming part of Letters Patent No. 145,335., dated December 9, 1873 application filed September 17, 1873.

To all who-m it may concern:

Be it known that we, MATTHEW THoMAs GHATMAN and MARK CHARLES CHAPMAN, of Aurora, county of Kane and State of Illinois,

- have invented certain Improvements in Wind mills. The following description, taken in connection with the accompanying plate of drawf upon a set of sails, commonly known as windmills; and the nature thereof consists in eertain improvements in the details of the construction of the same, hereinafter described.

In the accompanying drawing, which illustrates our invention,corresponding parts being illustrated by similar letters, Figure l is a side elevation. Fig. 2 is a top view. Fig. 3 is a detached view of the swivel-piece, upon which the shaft revolves.

The construction and relative arrangement of the parts of the machine are as follows: The beam A of the vane is fitted in a socket cast upon the revolving piece B, which is pro- Y vided with two casters, b, above, and a easter,

b', below. The upper casters or rollers, b, run upon the upper rim of the flange, which forms the top of the socket-piece C, and the lower casters b and b', socket-piece C, swivel-piece.

roller runs upon the under side thereof.' Upon the top of the said socket-piece are placed the balls d, which are secured in position' by the annular piece B. The flange c, upon the top ofthe swivelpiece E,rests upon the said balls, and rotates thereon with perfect ease, the said balls acting as frietionless bearin gs. The crank-shaft e of the wheel F revolves in a sleeve or journal-box, e', rigidly. attached toA the top of the swivel-piece E, which rotates in such a manner as to bring the wheel edgewise to the wind, when occasion requires its speed to be regulated. x designates a weight snspended by means of the rod y from the beam A, and connected by means of the chain z with the arm 71., which is rigidly attached to the swivel-piece E. The said weight serves to hold the vane in a position opposite to the windwheel F, except when the wind blows hard and the said wind-wheel is brought edgewise to the wind,in which ease the said weight acts as a governor to regulate the position of the said wheel. K designates a chain, which is secured to the beam A, and leads through the tubular arm m, downward through the 1101- low swivel-piece E, to a point below the same, where it is terminated by the ring n.

It is obvious that by applying any convenient power to the ring n, and forcing' the said chain downward, the vane, to which the beam A is attached, will be made to assume a posi` tion beneath and parallel to the tubular arm m, and to the plane of revolution of'the wheel F. Y It is also plain that by means of the said chain the wheel F may be made to occupy any desired angle t0 the direction of the wind.

le are aware that devices have been heretofore invented for adjusting the vane so that it may be set to turn the wind-wheel in any desired direction.

Having described our invention, we claim l. The combination of the revolving piece B, casters b and b', socket-piece C, swivelpiece E, having a flange, c, and journal-box c', arm l1, annular piece I3', balls d, beam A, chain c, provided with the ad'ustable weight :12, chain K, and tubular armm, all operating together as described.

2. The combination ofthe annular piece B',

E, provided with a llange, c, and journal-box c', arm h, beam A, chain e, rod y, provided with the adjustable weight chain K, and tubular arm m, all operating together as described.

In testimony that we claim the foregoing we have hereunto set our hands this 7th day of July, 1873.

WATIHEN T. CHAPMAN. MARK CI-IAS. CHAPMAN. Vitn e'sscs:

A. C. LITTLE, A. G. MoDoLL. 

